Doorlatch mechanism



May 19, 1931. s. 1.. RHINER DOORLATCH MECHANISM Filed May 2, 1930' '5knob in any Patented May 19, 1931 UNITED STATES messes PATENT FriesSHE-BRIE L. RHINER, 0F

DOORLATCH Application filed May 2,

This invention relates to a door latch mechanism and has for itsprincipal object the provision of a latch mechanism which can beoperated by tilting or swinging the direction as well as in the usualmanner by rotating the knob. v

Another object of the invention is to provide a latch mechanism whichwill accomplish the above and yet will be extremely simple in itsmechanical construction.

Other objects and advantages reside in the detail construction of theinvention which is designed for simplicity, economy, and efficiency.These will become more apparent from the following description.

In the following detailed description of the invention reference is hadto the accompanying drawings which form a part hereof. Like numeralsrefer to like parts in all views of the drawings and throughout thedescription.

In the drawings:

Fig. 1 is a perspective view illustrating the latch as it would appearupon a door.

Fig. 2 is a side elevation of the assembled latch.

Fig. 3 is a side elevation with the cover plate removed illustrating theinterior construction. I

Fig. 4 is a vertical section through the latch in position. The latchsection in this view is taken on the line H, Fig. 3.

Fig. 5 illustrates in diagram various positions of the interiormechanism corresponding to various positions of the door knob, to belater described. 6

At 10 in the drawings a section of a typical door is illustrated.

The invention comprises a latch case 11, one edge of which is providedwith the usual latch plate 12. When in place on the door the case 10 andthe plate 12 are inset in a mortise so that the surface of the plate 12will be flush with the edge of the door 10, as is usual with doorlatches. The case 10 is closed by means of a cover plate 13 securedthereon by a single clamp screw 14:. The clamp screw let is threadedinto a pivot post 15 extending from the back of the case 11. Two latchguide blocks 16 and a fulcrum.

PINE BLUFFS, WYOMIIIG MECHANISM 1930. Serial No. 449,164.

pin 17 also extend from the back of the case 11 and project through thecover plate 13.

A latch bolt 18 is constantly urged through the plate 12 by means of acompression spring 19 which is compressed between the guide blocks 16and the head of the latch bolt 18. The rearward extremity of the bolt 18is turned to a relatively smaller diameter so as to pass between theblocks 16 and is provided with a longitudinal slot 20.

A first toggle member 21 is hinged upon the pivot post 15. A secondtoggle member 22 is preferably formed of two sheet metal leaves therebeing one leaf secured to each 1 side of the toggle member 21 by meansof a pivot pin 23. The upper extremity of the second toggle member 22,extends through the slot 20 in the latch bolt 18. The spring 19 acts'toconstantly close the two toggle members 21 and 22 against each other.movement however, is limited and guided by the fulcrum post 17 whichextends through an irregular opening 25 in the second toggle member 22.The first toggle member 21 is prevented from swinging to the left inFig. 3, by a pointed extremity 21 which contacts with one of the guideblocks 16. It is free to swing to the right however.

It will be noted that the inner edges of both the toggle members arearcuate and concave so as to form an elliptical space therebetween. Inthis space a toggle operating mechanism is carried. The toggle operatingmechanism comprises two plates 26 maintained together by means of whicha roller bearing 28 may be carried to roll against the arcuate faces ofthe'toggle members 21 and 22. In each plate 26 a rectangular hole 29isformed.

The latch bolt is actuated by either moving the plates 26 laterally orvertically or by rotating them. These movements are accomplished bymeans of knobs 30, on the stems 30' of which balls 31are formed. Theknobs are held in place by means of escutcheons 32, in which ballsockets 33 are formed for the reception of the balls 31. The stems 30 ofthe knobs 30 are provided with longitudinal rectangular cores in whichrectangularkeys 34 slide. The keys 34' are formed Their spacing rivets27 upon each of be varied,

with rectangular tapered extremities 34 which are constantly forced intothe rectan-' gular openings 29 in the plates 26 by means of compressionsprings 36.

Owing to the thrust of the springs 36 the escutcheons 32 must besecurely clamped to the door 10. This may be accomplished by passingheaded sleeves 37 through one escutcheon, into which clamp screws 38 arethreaded through the other escutcheons. Both the screws 38 and thesleeves 37 pass through openings in the case ll and the cover 13 so thattheir position may be accurately located.

Operation Let us assume that one of the knobs 30 is forced downwardly,as shown in. broken line in Fig. 4, This causes the extremityof the key34 to force the toggle opera-ting mechanism upwardly as shown at A, Fig.5. In moving upward, the upper roller; 28 forces the toggle member 22 tothe left causing; its extremity 24 to retract the latch bolt 18.

Let us assume that one of the knobs 30' is raised to the upper brokenline position of Fig. 1. This. causes its latch pin 34:- to force theoperating mechanism downwardly as shown at B so that the; lowerroller'28 will force the toggle member 22 to the left to retract thelatch; bolt.

Let us assume that one of the knobs 30- is rotated.

This acts through the key 84 to: rotate the operating mechanism, asshown at C, causing the two rollers28to act as a lever'between thetoggle members to-pry' the toggle member 22' to the left to actuate thelatch. bolt.

Let us assume that one of the knobs 30 is moved laterally to the right.This will cause its key 34: to force the operating mechanism to theleft, as shown at. D, causing one or both rollers 28 to act againstandforee: the toggle member- 22 to the left.

Let us assume that the knob 30: is swung to the left. This will swingthe opera-ting mechanism to the right, as indicated at E causing one orboth of the rollers 28 to engage the first toggle member 21; and swingit to the right about the stud 15 so thatits lower extremity will swingthe lower extremity of the member 22 to the right. The member 22 acts asa lever about the fnlcrun'i, pin 21 so that its upper extremity willswing to the left to retract the latch bolt 18;

In the remainder of the case 11 any of the standard key locks may beinstalled if it is desired to employ the invention with'a key operatedmechanism In this type oflook the key actuated bolt could projectthrough. the plate 12 as indicated at F, Fig. 1.

lVhile a specific form of the improvement has been described andillustrated herein, it is desired to be understood that the same maywithin the scope of the, appended claims, without departing from thespirit of the invention.

Having thus described the invention, what is claimed and desired securedby Letters Patent is i l. A door latch mechanism comprising: a latchbolt; a. bolt operating mechanism; knobs mounted for swinging movement;keys projecting from said knobs so as to actuate said bolt operatingmechanism; and springs positioned so as to force said keys to co-actwith said operating mechanism.

2. A latch operating mechanism comprisng; a latch belt; a, fixed pivot;a first toggle lever mounted on said fixed pivot; a second toggle leverhinged to the extremity of said fixed lever and arranged tolie adjacentthere-v to, said second toggle lever being operatively connected to saidlatch bolt and a toggle operating member-mounted between; said twolevers so that lateral or rotative movement thereof will act to swingsaid levers.

3;. A latch operating mechanism comprise ing: a latch belt? a fixedpivot; a first toggle lever mounted on saidfixedpivot; a second togglelever hinged to the extremity of said fifxer lever and arranged to, lieadjacent there to, said second toggle lever being operatively cQnllectedto said latch bolt; a toggle operating member mounted between said two:levers so that lateral or rotative movement. thereof will act to swingsaid; levers and a second pivot pin adapted-tocontact with; said secondtoggle leverwhen said latter lever moves in one direction; and to.release sai dlever inother directions. 7

4. A latch operating mechanism comprising a latchbolt; a fixed; pivot;afirst toggle lever mounted on said fixed pivot; a SQQQILd toggle leverhinged to, the extremity of said fixed lever and arranged to lieadjacent there,- to, said second toggle lever being operativelyconnected to said latch belt; a toggle operating member mounted betweensaid two levers so, that lateral or rotative movement thereof will act,to swing said levers; areuate faces on said levers arranged to cooperatewith said actuating member. I

5.. A door latch mechanism comprising; a latch bolt; a fixedpivot post;a first toggle lever mounted on said pivot 'postand ex:- tending awayfrom said latch bolt; a. second toggle lever hinged to the extremityofthe first toggle lever extending toward said latch bolt andoperati-vely connected thereto; a; latch; operating memberpositionedbetween and held inlpl'ace by said toggle levers sotha-t rotationormovement thereof willactuate said levers to retract said latchbolt.

e, A door latch mechanism; comprising: a latch bolt; a fixed pivot post;a first toggle lever mounted on said pivot. post and extendingaway fromsaid-l'atchbolt a second toggle lever hingedto -the extremity of thefirst toggl'ealever-and extending toward-{said latch bolt andoperatively connected thereto; a latch operating member positionedbetween and held in place by said toggle levers so that rotation ormovement thereof will actuate said levers to retract said latch bolt;knobs; a universal joint for said knobs so as to allow them to be swunglaterally or vertically or rotated; keys projecting from said knobs intooperative contact with said latch operating member so as to impart acorresponding movement thereto.

7. A door latch mechanism comprising: a latch bolt; a fixed pivot post;a first toggle lever mounted on said pivot post and extending away fromsaid latch bolt; a second toggle lever hinged to the extremity of thefirst toggle lever and extending toward said latch bolt and operativelyconnected thereto; a

latch operating member positioned between and held in place by saidtoggle levers so that rotation or movement thereof will actuate saidlevers to retract said latch bolt; and a pivot pin arranged to co-actwith said second toggle lever when said first toggle lever is moved andto release said toggle lever when it is moved independently of saidfirst toggle lever.

In testimony whereof, I aflix my signature.

SHERRIE L. RHINER.

